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From Lead Iodide to Radical Form Lead-Iodide Superlattice: High Conductance Gain and Broader Band for Photoconductive Response
摘要： Superlattice materials offer new opportunities to modify optical and electrical properties of the recently emerging 2D materials. The insertion of tetraethylbenzidine into interlamination of the known 2D PbI2 semiconductor through a mild solution method yielded lead-iodide superlattice, EtDAB·4PbI2 (EtDAB = tetraethylbenzidine), with radical and non-radical forms. The non-radical form has a nonionic structure that differs from the common ionic structures for inorganic–organic hybrid lead halides. The radical form shows five orders of magnitude of conductance gain and broader photoconductive response range (UV–Vis → UV–Vis–IR), compared with pure PbI2 and the non-radical form.
关键词： Inorganic-organic hybrid,Photoconductive,Semiconductive,Lead halide,Superlattice
更新于2025-09-23 15:22:29
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From Lead Iodide to Radical Form Lead-Iodide Superlattice: High Conductance Gain and Broader Band for Photoconductive Response
摘要： Superlattice materials offer new opportunities to modify optical and electrical properties of the recently emerging 2D materials. The insertion of tetraethylbenzidine into interlamination of the known 2D PbI2 semiconductor through a mild solution method yielded lead-iodide superlattice, EtDAB·4PbI2 (EtDAB = tetraethylbenzidine), with radical and non-radical forms. The non-radical form has a nonionic structure that differs from the common ionic structures for inorganic–organic hybrid lead halides. The radical form shows five orders of magnitude of conductance gain and broader photoconductive response range (UV–Vis → UV–Vis–IR), compared with pure PbI2 and the non-radical form.
关键词： Inorganic-organic hybrid,Photoconductive,Semiconductive,Lead halide,Superlattice
更新于2025-09-23 15:22:29
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Mid-Wavelength Infrared Responsivity of Colloidal Quantum Dot/Organic Hybrid Photodetectors
摘要： Colloidal quantum dot/organic hybrid materials approach offer a path toward engineering solution-processed photodetectors with extended spectral responsivity in the infrared. We demonstrate this approach in the technologically important thermal infrared region of mid-wavelength infrared, utilizing a solution blend of Ag2Se colloidal quantum dots and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). We report on the device fabrication and their room temperature optical, electrical, and optoelectronic properties. At room temperature, a responsivity of 0.2 mA/W was measured under 5 μm irradiation and 5 V bias. The new hybrid optoelectronic film demonstrated the advantage of cost-effectiveness and greater fabrication versatility than the single crystal or epitaxial semiconductors that comprise today’s infrared technologies.
关键词： Colloidal quantum dots,Photodetectors,Mid-wavelength infrared,Organic hybrid,Responsivity
更新于2025-09-23 15:21:01
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Highly Efficient Energy Transfer from Water Soluble Zinc Silver Indium Sulphide Quantum Dot to Organic J-Aggregates
摘要： The present work has been carried out with an aim to design and develop an efficient light harvesting inorganic-organic hybrid nanoscale material by employing less toxic, environment friendly inorganic substance and also to understand the mechanism of inter-particle electronic interaction between the inorganic and organic components of the nanomaterial. Specifically, the inorganic-organic hybrid associate has been made by integrating water soluble semiconductor QDs (Zinc-silver-indium-sulfide (ZAIS)) and organic J-aggregates of a cyanine dye (S2165). The fabrication of present nano-hybrid system has been achieved via electrostatically driven self-assembly of organic dyes over ZAIS QDs. The interaction between QD and J-aggregates have been investigated by steady state and time resolved fluorescence measurements. Zeta potential measurements have also been performed to understand the role of electrostatic interaction and thermodynamic feasibility of the association process. The investigations have revealed that energy transfer (ET) process between QD and J-aggregates mediated through dipole-dipole mechanism. Interestingly, data analysis based on F?rster theory has further revealed that the ET from QD to J-aggregates is very high indicating efficient electronic coupling between the inorganic QD and the organic J-aggregates. Zeta potential measurements and thermodynamic calculations have demonstrated that the interaction between QD and organic dye is electrostatically driven and the association of organic dyes over QD is thermodynamically feasible. The outcome of the present study is expected to be helpful in designing efficient nanoscale light harvesting devices. Additionally, fluorescence microscopy and toxicity studies on the QDs have also shown its suitability for biological applications.
关键词： energy transfer,fluorescence microscopy,electrostatic interaction,J-aggregates,inorganic-organic hybrid,toxicity studies,quantum dots
更新于2025-09-23 15:21:01
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A Comparative Study on the Photovoltaic Properties of ZnX (X=S, Se, Te) QD/CNT Inorganic/Organic Hybrid Nanocomposites
摘要： Designing the efficient inorganic/organic hybrid light harvesting systems through understanding of charge generation, separation and recombination dynamics is an important pathway for improvement of power conversion efficiency (PCE) of photovoltaic cell. Using density functional method, we explored the photovoltaic performance of recently synthesized ZnX (X=S, Se, Te) QD/carbon nanotube (CNT) nanocomposites. Interestingly, ZnX QD/CNT nanocomposites exhibit type-II band alignment, where hole and electron charge carriers are localized on ZnX QD and CNT, respectively. However, the energy difference between highest occupied molecular orbital of ZnXQD and conduction band minimum of CNT is very small (0.09-0.26 eV), implying huge possibilities of electron-hole recombination at ZnX:CNT interface. To overcome such unpleasant situation, we focus on chemical modification of CNT. The CNT is hydrogenated by attachment of atomic hydrogen and next the hydrogenated CNT is functionalized by electron withdrawing group (-CN) in part. We found that ZnX QD and CN functionalized hydrogenated CNT nanocomposites exhibit intended type-II band alignment and achieve high PCEs in the range of 6.73-8.38%, making them exceptionally competitive with other previously reported hybrid solar cells.
关键词： inorganic/organic hybrid nanocomposites,power conversion efficiency,ZnX QD/CNT,type-II band alignment,photovoltaic properties
更新于2025-09-23 15:19:57
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2D perovskite hybrid with both semiconductive and yellow light emission properties
摘要： Owing to the structural diversity and potential applications in optoelectronic devices, inorganic-organic hybrid materials have attracted great attentions in recent years. They have potential applications in the fields of fluorescence, photoconductivity, ferroelectricity and solar cells. A new inorganic-organic hybrid, [H2(dmen)]PbCl4 (dmen = N,N-Dimethylethylenediamine), was solvothermally synthesized using [H2(dmen)]2+ as templates and balance cations. The inorganic structure is two-dimensional (2D) single layer perovskite. This compound exhibits typical semiconductive behavior, whose conductivity increases along with the raising of temperature. The compound also shows yellow light emission property, which indicates great potential application in light-emitting diodes.
关键词： Semiconductor,Perovskite,Functional motifs,Inorganic-organic hybrid,LEDs
更新于2025-09-19 17:15:36
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<i>(Keynote)</i> Silicon-Organic Hybrid Photonics: Integration of Electro-Optical Polymers in a Photonic Integrated Circuit Technology
摘要： In this work, we present recent results on the hybrid integration of electro-optical organic materials in a photonic integrated circuit (PIC) technology. We review some of the identified challenges regarding process compatibility and present preliminary results on the integration of organic materials in a PIC technology using a 0.25 μm SiGe BiCMOS pilotline. Here, we are focusing on electro-optical applications towards high-speed modulators with ultra-low energy consumption.
关键词： Ultra-Low Energy Consumption,Silicon-Organic Hybrid Photonics,Electro-Optical Polymers,High-Speed Modulators,Photonic Integrated Circuit
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK) - Kyoto, Japan (2019.11.14-2019.11.15)] 2019 IEEE International Meeting for Future of Electron Devices, Kansai (IMFEDK) - Invited: Polymer Light-Emitting Devices with Selectively Transparent Photonic Crystals Consisting of Printed Inorganic/Organic Hybrid Dielectric Films
摘要： Selectively transparent photonic crystals consisting of printed inorganic/organic hybrid dielectric films based on inorganic copper(I) thiocyanate can be produced to exhibit intense Bragg peaks over their stop band in the visible region. This work exhibits a unique approach to achieve the improvement of color purity and the strong directed emission pattern for polymer light-emitting diodes and AC-driven electroluminescent devices with printed inorganic/organic hybrid dielectric mirrors, which will be important for all-printed microlight sources.
关键词： photonic crystal,dielectric film,distributed Bragg reflector,inorganic/organic hybrid film,polymer light-emitting device,solution process
更新于2025-09-16 10:30:52
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Silicon-Organic Hybrid Photonic Devices in a Photonic Integrated Circuit Technology
摘要： In this work, we present recent results on the hybrid integration of electro-optical organic materials in a photonic integrated circuit (PIC) technology. We review some of the identi?ed challenges regarding process compatibility and present experimental results on the integration of organic materials in a PIC technology using a 0.25 μm SiGe BiCMOS pilotline. Here, we are focusing on electro-optical applications toward high-speed modulators with ultra-low energy consumption.
关键词： photonic integrated circuit,high-speed modulators,electro-optical materials,silicon-organic hybrid,ultra-low energy consumption
更新于2025-09-16 10:30:52
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Slot-Waveguide Silicon Nitride Organic Hybrid Distributed Feedback Laser
摘要： one of the major barriers for a widespread commercial uptake of silicon nitride photonic integrated circuits for cost-sensitive applications is the lack of low-cost monolithically integrated laser light sources directly emitting into single-mode waveguides. In this work, we demonstrate an optically pumped organic solid-state slot-waveguide distributed feedback laser designed for a silicon nitride organic hybrid photonic platform. Pulsed optical excitation of the gain medium is achieved by a 450 nm laser diode. the optical feedback for lasing is based on a second-order laterally coupled Bragg grating with a slot-waveguide core. Optimized material gain properties of the organic dye together with the increased modal gain of the laser mode arising from the improved overlap of the slot-waveguide geometry with the gain material enable single-mode lasing at a wavelength of 600 nm. The straightforward integration and operation with a blue laser diode leads to a cost-effective coherent light source for photonic integrated devices.
关键词： photonic integrated circuits,silicon nitride,slot-waveguide,distributed feedback laser,organic hybrid
更新于2025-09-12 10:27:22